Fourteen people were killed after a helicopter belonging to Saudi oil giant Saudi Aramco crashed in the eastern Saudi city of Ras Tanura on Sunday, Reuters reported citing the state news agency.The cause of the crash was not immediately known, and authorities have launched an investigation into the incident, the state news agency added.Saudi Aramco is the world’s largest oil company by production and market value. Its facilities at Ras Tanura, located on Saudi Arabia’s Gulf coast, include one of the world’s largest oil refineries and export terminals, serving as a critical hub for the kingdom’s crude oil exports.This is a developing copy. More details awaited.